The Effect of Alloying on the Thermophysical and Mechanical Properties of Co–Ti–Cr-Based Superalloys

Zenk C, Volz N, Bezold A, Huber LK, Eggeler Y, Spiecker E, Göken M, Neumeier S (2020)

Publication Language: English

Publication Type: Conference contribution, Conference Contribution

Subtype: other

Publication year: 2020

Publisher: Springer International Publishing

City/Town: Cham

Pages Range: 909-919-919

ISBN: 978-3-030-51834-9

DOI: 10.1007/978-3-030-51834-9_89

Abstract

The system Co–Ti–Cr was recently identified as a very promising base for low mass-density Co-based superalloys. This study presents the influence of quaternary alloying additions on the thermophysical and mechanical properties of a Co–11Ti–15Cr model superalloyModel superalloy. Al, Ta, Re, and W were selected as a starting point for alloy developmentAlloy development as they represent important alloying elements in both Ni-based and Co–Al–W-based superalloys. Microstructure analysis reveals that the addition of only 1 at.% of either of these elements causes the formation of different undesired intermetallic phases in addition to γ and γ′ phases, which is in agreement with thermodynamic calculations. However, a diffusion couple between the Co–Ti–Cr and a Co–Al–W–Ta alloy suggests that the tolerance for alloying elements without destabilizing the γ/γ′ two-phase microstructure is higher when they are present in a certain ratio. Energy-dispersive X-ray spectroscopy shows that Cr and Re are enriched in the γ phase, whereas Ti and W preferentially partition to γ′. All alloying elements increase the yield strength at room temperature, but are disadvantageous at 1000 °C. Re and W retain their strengthening effect up to 900 °C.

Authors with CRIS profile

Christopher Zenk Lehrstuhl für Werkstoffwissenschaften (Werkstoffkunde und Technologie der Metalle) Nicklas Volz Lehrstuhl für Werkstoffwissenschaften (Allgemeine Werkstoffeigenschaften) Andreas Bezold Sonderforschungsbereich/Transregio 103 Vom Atom zur Turbinenschaufel - wissenschaftliche Grundlagen für eine neue Generation einkristalliner Superlegierungen Laura-Kristin Huber Lehrstuhl für Werkstoffwissenschaften (Allgemeine Werkstoffeigenschaften) Yolita Eggeler Lehrstuhl für Werkstoffwissenschaften (Mikro- und Nanostrukturforschung) Erdmann Spiecker Lehrstuhl für Werkstoffwissenschaften (Mikro- und Nanostrukturforschung) Mathias Göken Lehrstuhl für Werkstoffwissenschaften (Allgemeine Werkstoffeigenschaften) Steffen Neumeier Lehrstuhl für Werkstoffwissenschaften (Allgemeine Werkstoffeigenschaften)

Additional Organisation(s)

Lehrstuhl für Werkstoffwissenschaften (Mikro- und Nanostrukturforschung) Interdisziplinäres Zentrum, Center for Nanoanalysis and Electron Microscopy (CENEM)

Related research project(s)

B03 (FP3): Einkristalline Co-Basis Superlegierungen (SFB/TRR 103) SFB/TRR 103 Jan. 1, 2020 - Dec. 31, 2023 High resolution transmission electron microscopy investigation of the atomic structure of defects and interfaces in single crystal superalloys (A07) (TRR 103) TRR 103: Vom Atom zur Turbinenschaufel - wissenschaftliche Grundlagen für eine neue Generation einkristalliner Superlegierungen Jan. 1, 2012 - Jan. 1, 2015

How to cite

APA:

Zenk, C., Volz, N., Bezold, A., Huber, L.-K., Eggeler, Y., Spiecker, E.,... Neumeier, S. (2020). The Effect of Alloying on the Thermophysical and Mechanical Properties of Co–Ti–Cr-Based Superalloys. In Tin S, Hardy M, Clews J, Cormier J, Feng Q, Marcin J, O'Brien C, Suzuki A (Eds.), (pp. 909-919-919). Cham: Springer International Publishing.

MLA:

Zenk, Christopher, et al. "The Effect of Alloying on the Thermophysical and Mechanical Properties of Co–Ti–Cr-Based Superalloys." Ed. Tin S, Hardy M, Clews J, Cormier J, Feng Q, Marcin J, O'Brien C, Suzuki A, Cham: Springer International Publishing, 2020. 909-919-919.

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